Commit ca23669c authored by euxane's avatar euxane
Browse files

writers: add writeNim and writeNimBin 

This adds convenience writers for self-contained Nim programs.
Those are compiled into very small binaries.

Test with: `nix build .#pkgs.tests.writers.{bin,simple,wrapping}.nim`
parent 1b42ea0a

pkgs/build-support/writers/scripts.nix

+47 −0
Original line number Diff line number Diff line
@@ -651,6 +651,53 @@ rec { 
  */

  writeHaskellBin = name: writeHaskell "/bin/${name}";



  /**

    writeNim takes a name, an attrset with an optional Nim compiler, and some

    Nim source code, returning an executable.



    # Examples

    :::{.example}

    ## `pkgs.writers.writeNim` usage example



    ```nix

      writeNim "hello-nim" { nim = pkgs.nim2; } ''

        echo "hello nim"

      '';

    ```

    :::

  */

  writeNim =

    name:

    {

      makeWrapperArgs ? [ ],

      nim ? pkgs.nim2,

      nimCompileOptions ? { },

      strip ? true,

    }:

    let

      nimCompileCmdArgs = lib.cli.toGNUCommandLineShell { optionValueSeparator = ":"; } (

        {

          d = "release";

          nimcache = ".";

        }

        // nimCompileOptions

      );

    in

    makeBinWriter {

      compileScript = ''

        cp $contentPath tmp.nim

        ${lib.getExe nim} compile ${nimCompileCmdArgs} tmp.nim

        mv tmp $out

      '';

      inherit makeWrapperArgs strip;

    } name;



  /**

    writeNimBin takes the same arguments as writeNim but outputs a directory

    (like writeScriptBin)

  */

  writeNimBin = name: writeNim "/bin/${name}";



  /**

    Like writeScript but the first line is a shebang to nu

pkgs/build-support/writers/test.nix

+27 −0
Original line number Diff line number Diff line
@@ -31,6 +31,8 @@ let 
    writeJSBin

    writeJSON

    writeLua

    writeNim

    writeNimBin

    writeNu

    writePerl

    writePerlBin
@@ -109,6 +111,10 @@ recurseIntoAttrs { 
        _ -> print "fail"

    '');



    nim = expectSuccessBin (writeNimBin "test-writers-nim-bin" { } ''

      echo "success"

    '');



    js = expectSuccessBin (writeJSBin "test-writers-js-bin" { libraries = [ nodePackages.semver ]; } ''

      var semver = require('semver');
@@ -191,6 +197,10 @@ recurseIntoAttrs { 
      end

    '');



    nim = expectSuccess (writeNim "test-writers-nim" { } ''

      echo "success"

    '');



    nu = expectSuccess (writeNu "test-writers-nushell" ''

      echo "success"

    '');
@@ -411,6 +421,23 @@ recurseIntoAttrs { 
        ''

    );



    nim = expectSuccess (

      writeNim "test-writers-wrapping-nim"

        {

          makeWrapperArgs = [

            "--set"

            "ThaigerSprint"

            "Thailand"

          ];

        }

        ''

          import os



          if getEnv("ThaigerSprint") == "Thailand":

            echo "success"

        ''

    );



    python = expectSuccess (

      writePython3 "test-writers-wrapping-python"

        {